X84041 Datasheet | Xicor

FEATURES - Direct Interface to Micros - Eliminates I/O port requirements - No interface glue logic required - Eliminates need for parallel to serial converters - 3.3Mbps data transfer rate - Low Power CMOS - 2.7V to 5.5V Operation - Standby Current Less than 50µA - Active Current Less than 1m A - 45ns Read Access Time - 8-Byte Page Write Mode - Typical Nonvolatile Write Cycle Time: 5ms - High Reliability - 100,000 Endurance Cycles - Guaranteed Data Retention: 100 Years - 8-Lead PDIP, 8-Lead SOIC, and 14-Lead TSSOP Packages DESCRIPTION The X84041 Micro Port Saver is a 4096-bit CMOS E2PROM designed for a direct interface to port limited microcontroller or I/O limited microprocessor designs. The X84041 provides all of the benefits of serial memories, such as low cost, low power, low voltage operation, and small package size, while featuring higher data transfer rates and reduced interface code requirements- without the need for a dedicated serial bus. The X84041 is organized as a 512 x 8, but is also suitable in 16-bit or 32-bit environments, due to the bit serial nature of the interface. The X84041 directly connects to the processor bus and municates over a single data line using a sequence of standard bus read and write operations. This eliminates the need for dedicated port pins, parallel to serial converters, plicated ASIC implementations, or other glue logic, lowering system cost. BLOCK DIAGRAM 8 7 X84041 6 5 VCC NC OE WE 2704 ILL F01.2 PIN CONFIGURATION DIP/SOIC CE I/O WP VSS 1 2 3 4 H.V. GENERATION TIMING & CONTROL CE OE WE I/O MAND DECODE AND CONTROL LOGIC X DEC EEPROM ARRAY 512 x 8 TSSOP CE I/O NC NC NC WP VSS 1 2 3 5 6 7 14 13 12 10 9 8 VCC NC NC NC NC OE WE 2704 ILL F02a.1 Y DECODE DATA REGISTER 2704 ILL F02 4 X84041 11 PIN NAMES I/O CE OE WE WP VCC VSS NC Data Input/Output Chip Enable Input Output Enable Input Write Enable Input Write Protect Input Supply Voltage Ground No Connect 2704 PGM T01 © Xicor, Inc. 1994, 1995, 1996 Patents Pending 2704-4.4...